ICLS6023J Infineon Technologies, ICLS6023J Datasheet - Page 22

• Manufacturer Part Number: ICLS6023J
• Manufacturer: Infineon Technologies

Specifications of ICLS6023J

• Packages: PG-DIP-8
• Vds: 650V
• Rds (on): 1,70

3.6.2
The IC provides several protection features to increase the LED drive’s robustness and safety. The following table
shows the possible system failures and the corresponding protection modes.
Table 3
VCC Overvoltage
Overtemperature
Overload
Open Loop
VCC Undervoltage
Floating Load Protection (FLP)
3.6.2.1
The VCC voltage is observed by the comparator C13 if 20.5 V is exceeded. The output of C13 is combined with
both the output of C3, which checks for V
Therefore, overvoltage detection can only be active during the soft start phase (V
is outside the operating range (> 4.5 V). This means any small voltage overshoots of V
operation cannot trigger the Auto Restart mode during startup.
Figure 16
In order to ensure system reliability and prevent any false activation, a blanking time is implemented before the IC
can enter Auto Restart mode during startup. The output of the VCC overvoltage detection circuit is fed into a spike
blanking with a time constant of 8.0 µs.
Data Sheet
Protection Modes
Protection modes
Auto Restart Mode during Startup
Auto Restart mode during startup
VCC
20.5V
4.0V
UVLO
4.5V
Auto Restart mode during startup
Auto Restart mode during RUN mode
Auto Restart mode during RUN mode
Auto Restart mode during RUN mode
Auto Restart mode during RUN mode
Floating Load Protection mode
FB
SoftS
SoftS
FF2
S
R
C13
C3
C4
Q
< 4.0 V, and the output of C4, which checks for V
Thermal Shutdown
22
G13
T
G12
&
j
&
>140°C
Blanking
Spike
8.0us
Control Unit
Internal
Restart
Mode
Bias
Auto
SoftS
LED System Driver ICs
< 4.0 V) and if the FB signal
VCC
Functional Description
Version 1.0, 2011-05-19
occurring during normal
ICLS6x Series
FB
> 4.5 V.